CN105583235A - Method for controlling iron scale structures of hot-rolled steel bars by stepped cooling - Google Patents

Method for controlling iron scale structures of hot-rolled steel bars by stepped cooling Download PDF

Info

Publication number
CN105583235A
CN105583235A CN201511005630.9A CN201511005630A CN105583235A CN 105583235 A CN105583235 A CN 105583235A CN 201511005630 A CN201511005630 A CN 201511005630A CN 105583235 A CN105583235 A CN 105583235A
Authority
CN
China
Prior art keywords
cooling
temperature
hot
iron scale
scale
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201511005630.9A
Other languages
Chinese (zh)
Other versions
CN105583235B (en
Inventor
王卫卫
李光瀛
肖金福
张江玲
白宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central Iron and Steel Research Institute
Original Assignee
Central Iron and Steel Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Central Iron and Steel Research Institute filed Critical Central Iron and Steel Research Institute
Priority to CN201511005630.9A priority Critical patent/CN105583235B/en
Publication of CN105583235A publication Critical patent/CN105583235A/en
Application granted granted Critical
Publication of CN105583235B publication Critical patent/CN105583235B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium

Abstract

A method for controlling iron scale structures of hot-rolled steel bars by stepped cooling belongs to the technical field of steel rolling. Compact iron scale structures are obtained through optimization of a rolling and cooling process, so that a problem that steel bars produced by a post-rolling forceful through-water process are fast in corrosion rate and serious in corrosion degree in atmosphere is solved, and a goal that rust is relieved within a period of time is achieved. By adopting a stepped cooling process and the method for controlling the iron scale structures, provided by the invention, a traditional through-water cooling process can be replaced, so that mechanical property of an HRB400 (hot-rolled ribbed bar)-grade steel bar with phi 20 to 25 mm of a typical specification meets requirements of various technical indexes of GB 1499.2-2007; meanwhile, when being delivered to a cooling bed, each of all hot-rolled high-strength steel bars produced by adopting the stepped cooling process does not have a surface red Fe2O3 rust layer; shown by SEM (scanning electron microscope) analysis, iron scale is 10 to 30 [mu]m thick; after staying for one month in the open air, corrosion area of a sample is reduced by 50 percent in comparison with that of a steel bar produced by a traditional forceful through-water process.

Description

The method of the cooling control scale structure of segmentation notch cuttype of hot-rolled reinforced bar
Technical field
The invention belongs to technical field of steel rolling, particularly relate to a kind of cooling control oxidation of segmentation notch cuttype of hot-rolled reinforced barThe method of iron sheet structure.
Background technology
The production technology of current domestic hot rolled ribbed bars is divided into two types substantially, and one is nature after traditional hot rollingCooling-production technology, another is after hot rolling, to wear by force cooling process, the former need to add a certain amount of strong in reinforcing barAlloy element, the resistant tarnishing of its Ribbed Bar is better, but cost of alloy is higher; The reinforcing bar of rear a kind of explained hereafter,Saved cost of alloy, alloy addition level significantly reduces, but the martensite boxing existing connects softening and Chuan Shui rear surfaceThe problem of red rust, its stainless property is poor, has had a strong impact on follow-up use, and user even proposes return goods or fallThe requirement that valency is sold, the reinforcing bar Surface Quality especially exporting to foreign countries requires stricter.
Reinforcing bar for puzzlement enterprise rolls rear corrosion problem of wearing by force after water, is mainly both at home and abroad wearing the increasing of water reinforcing bar outsideAdd cover layer, comprise the coat of metal, passivation layer, chemical conversion layer, phosphatization, organic coating etc. Owing to consideringCost performance, adopts novel cooling process method, on-line spray antirust agent and corrosion inhibitor to suppress to wear water bar list mostlyThe generation of flushing rust. Online or the technology of off-line to the agent of rebar surface rust prevention by applying liquid material of the positive exploratory development of some enterprises,These technology due to immature, impracticable, to drop into improvement cost high or cause the reasons such as environmental pollution not recognized by industryCan with promote the use of. Because domestic reinforcing bar is mainly to be welded as master, key project and big-and-middle-sized engineering are all strict with notAllow to occur martensitic structure.
Wear top layer martensite ring and the surperficial red rusty scale problem that cooling process causes and be not resolved always, become tiredDisturb the great technology barrier of China's hot-rolled high-strength reinforcing bar performance quality, be applicable to hot-rolled high-strength reinforcing bar in the urgent need to oneThe evenly novel cooling technology of strengthening, can, under the prerequisite of avoiding quenched martensite ring to occur, obtain required mechanicsPerformance prevents the formation of rebar surface red rust simultaneously. Iron and Steel Research Geueral Inst research team is by reinforcing bar scale structureControl technology has obtained good atmospheric corrosion resistance effect.
Summary of the invention
The object of this invention is to provide a kind of method of the cooling control scale structure of segmentation notch cuttype of hot-rolled reinforced bar,Obtain fine and close scale structure by the optimization of rolling and process for cooling, roll the rear water explained hereafter of wearing by force to solveCorrosion rate and the corrosion degree serious problem of reinforcing bar in atmosphere, reach (in sales cycle) in a period of timeAlleviate the target of getting rusty. The present invention had both ensured the mechanical property of Ribbed Bar, had avoided again tradition to roll the rear water-cooled of wearing by forceBut the destruction of technique to rebar surface iron oxide cortex, has improved the stainless property of hot-rolled reinforced bar.
For achieving the above object, the technical parameter of technique and control is as follows:
(1) percentage by weight of described reinforcing bar chemical composition is C:0.20%-0.25%, Si:0.30%-0.60%,Mn:0.90%-1.40%, V:0-0.02%, Cr:0-0.25%, P≤0.035%, S≤0.040%, all the otherFor iron and inevitable impurity.
(2) smelting continuous casting process is common process, is mainly control composition and field trash, meets GB for rolling providesThe qualified continuous casting billet requiring;
(3) steel rolling is produced, and billet heating temperature is 1100 DEG C-1150 DEG C, and steel billet tapping temperature is 1050 DEG C-1100 DEG C,Start rolling temperature is 1000 DEG C-1080 DEG C, and finishing temperature is 1000 DEG C-1050 DEG C;
(4) after finish to gauge reinforcing bar with 10m/s～15m/s speed operation and the rebar surface more than 1000 DEG C enters to temperatureRow quick cooling processing, i.e. Vcooling>=100 DEG C/s; Adopt rapid cooling-return temperature-rapid cooling-return segmentation notch cuttype control of temperature circulationCooling means, obtains the optimization cooling path of lowering the temperature-returning warm, makes the running reinforcing bar of high temperature and high speed logical in 1s to 3sWhile crossing the cooling section of water and water smoke mixing composition, utilize evaporation of water to take away a large amount of latent heats of vaporization, thereby after quick coolingReturn temperature to 600～980 DEG C of target temperatures; To tissue, mechanical property and slow demand of getting rusty, roll rear cooling according to userIn process, implement scale structure control technique simultaneously.
(5) scale structure control technique: application segmentation notch cuttype process for cooling control surface and heart portion maximum temperature differenceIt is 200～400 DEG C; Iron scale even thickness is controlled at 10～30 μ m; Scale structure is a certain proportion of FeO+20～50％Fe3O4; Improve the Nomenclature Composition and Structure of Complexes of surface scale in cooling procedure in, ensure the densification of structureIntegrality.
Scale structure control technique major technique is crucial as follows:
(a) dwindle surface and the temperature difference of heart portion: segmentation notch cuttype process for cooling control surface and heart portion maximum temperature difference are200～400 DEG C, far below wearing the water cooling temperature difference (500～700 DEG C), and not disposable cooling the completing of temperature drop process,But progressively dwindle surface by the attenuation type zigzag cooling procedure of the temperature of constantly lowering the temperature-return among a small circle-lower the temperature-return warmWith the temperature difference of heart portion, thereby realize the entirety cooling of material, make surface more tiny evenly with the microscopic structure of heart portion;
(b) improve iron scale thickness and composition: iron scale even thickness is controlled at 10～30 μ m; Iron oxide leather blockStructure is a certain proportion of FeO+20～50%Fe3O4. Take to reduce in vapour pressure, high velocity air layer, improve heat exchange efficiency,Destroy steam blanket, adjust the measures such as partial pressure of oxygen, improve Fe in iron scale3O4Ratio, avoid Fe2O3Generation orReduce its growing amount, improve scale on surface pattern and structure;
(c) compactness and the integrality of guarantee iron scale: the outer FeO+Fe that generates3O4Iron scale, reduce beatHit the iron scale destructiveness that pressure and thermal stress cause, ensure the integrality of iron scale, final acquisition requiresIron scale surface topography and layer structure reach the object that delays to get rusty.
(d) the eutectoid reaction degree of control FeO: in the time that temperature drops to below 570 DEG C, formed simple substance in oxygen-depleted zone, there is Fe at oxygen-rich area in Fe nucleus simultaneously3O4Forming core, the two forms the nucleus of an eutectoid reaction product jointly. AltogetherAfter the nucleus of analysing product forms, continue to grow up, finally formed the Fe of sheet3O4/ Fe eutectoid reaction product, destroysThe integrality of structure. There is not pro-eutectoid transformation and eutectoid reaction when controlling rebar surface, just can obtain resistance to preferablyAtmospheric corrosion effect.
(e) cooling rear upper cold bed returns the control of Wen Wendu: by controlling segmentation notch cuttype process for cooling, can realize tableThe flexible control of surface temperature, the requirement (whether allowing to occur tempered sorbite ring) according to user to microscopic structure, controlRebar surface processed returns Wen Wendu within the scope of 600～980 DEG C, realizes tissue variation and controls;
Advantage of the present invention and innovative point are:
(1) on the basis of original hot rolled ribbed bars HRB335 composition, C, Si, Mn, V alloy have been optimizedThe addition of element, has significantly reduced the addition of Mn, V alloy element, and cost of alloy significantly reduces;
(2) by controlling segmentation notch cuttype process for cooling, realize the cooling procedure of the temperature of lowering the temperature-return-temperature circulation of lowering the temperature-return,By the temperature-attenuation type zigzag type of cooling of lowering the temperature-returning warm of constantly lowering the temperature-return among a small circle, replace routine to wear water conservancy project skillThe disposable type of cooling, progressively dwindle surface and the temperature difference of heart portion;
(3), by taking the cooling Optimization Technology of segmentation notch cuttype, improve heat exchange efficiency in high velocity air layer, break steamingThere is not the measures such as pro-eutectoid transformation and eutectoid reaction in steam film, control surface, makes reinforcing bar iron scale thickness 10～30μ m; Improve Fe in iron scale simultaneously3O4Ratio, obtain 20～50%Fe3O4, improve scale on surfacePattern, structure and integrality, realize the target that delays to get rusty within sales cycle and improve microstructure.
(4) flexible control of surface temperature: the requirement according to user to microscopic structure, control surface returns Wen Wendu and existsWithin the scope of 600～980 DEG C, obtain the required all technical requirement of GB1499.2-2007, realize the low of reinforcing bar simultaneouslyCost is strengthened and is delayed to get rusty.
Brief description of the drawings
Fig. 1 is the actual measurement temperature drop curve map of segmentation notch cuttype process for cooling of the present invention different cool times of surface and heart portion.
Fig. 2 is the microscopic structure from limit portion to heart portion (the cold bed temperature 620 DEG C) figure of hot-rolled reinforced bar in embodiment 1.
Fig. 3 is microscopic structure (770 DEG C of the upper cold bed temperatures) figure of hot-rolled reinforced bar limit portion in embodiment 2.
Fig. 4 is microscopic structure (820 DEG C of the upper cold bed temperatures) figure of hot-rolled reinforced bar limit portion in embodiment 2.
Fig. 5 is the new technology actual measurement temperature drop curve map that the not the same cold bed in the embodiment of the present invention 3 returns Wen Wendu.
Fig. 6 is the outdoor storage of the present invention corrosion pattern of 1 month (measuring corrosion area 35%) figure.
Fig. 7 wears by force water conservancy project skill (comparative example) the outdoor storage corrosion pattern of 1 month (measuring corrosion area 70%)Figure.
Fig. 8 is the iron scale shape appearance figure of new technology of the present invention.
Fig. 9 is the iron scale shape appearance figure of new technology of the present invention after 8 months.
Figure 10 is iron scale pattern and the Structure Comparison figure that wears by force water conservancy project skill (comparative example).
Detailed description of the invention
Embodiment 1:
1) the internal control chemical composition of test reinforcing bar 1: C0.22%, Si0.41%, Mn1.18%, P0.033%, S0.018%, Cr0.011%, Ni0.006%, V0.002%, Fe surplus.
2) to carrying out hot rolling after strand conventional heating, rolling specs is Φ 20mm, and 1150 DEG C of billet heating temperature, go out1100 DEG C of furnace temperatures, start rolling temperature is 1070 DEG C, finishing temperature exists: 1050 DEG C;
3) after finish to gauge, reinforcing bar moves with 14.0m/s speed, and rebar surface is carried out to quick cooling processing 2s, on average coldSpeed Vcooling>=100 DEG C/s; Adopt rapid cooling-return temperature-rapid cooling-return the segmentation notch cuttype control cooling means of temperature circulation, in controlCold bed returns 600～680 DEG C of Wen Wendu;
4) the hot-rolled high-strength reinforcing bar of all employing segmentation notch cuttype process for cooling, does not all occur after upper cold bed that surface is redFe2O3Rusty scale.
5) outdoor placement 1 month, corrosion area be equivalent to wear by force cooling process corrosion area 50%.
Embodiment 2:
1) chemical composition of commerical test reinforcing bar: C0.23%, Si0.44%, Mn1.39%, P0.035%, S0.030%,V0.032%, Fe surplus.
2) to carrying out hot rolling after strand conventional heating, rolling specs is Φ 25mm, controls finishing temperature and exists: 1050 DEG C;
3) after finish to gauge, reinforcing bar moves with 11.5m/s speed, and rebar surface is carried out to quick cooling processing 2s, on average coldSpeed Vcooling>=100 DEG C/s; Adopt rapid cooling-return temperature-rapid cooling-return the segmentation notch cuttype control cooling means of temperature circulation, in controlIt is 770～980 DEG C that cold bed returns Wen Wendu;
4) after upper cold bed, all there is not surperficial red Fe2O3Rusty scale.
Embodiment 3:
1) chemical composition of test reinforcing bar 1: C0.25%, Si0.34%, Mn1.44%, P0.031%, S0.031%,Cr0.037%, Fe surplus.
2) to carrying out hot rolling after strand conventional heating, rolling specs is Φ 20mm, controls finishing temperature and exists: 1050 DEG C;
3) after finish to gauge, reinforcing bar moves with 11.5m/s speed, and rebar surface is carried out to quick cooling processing 2s, on average coldSpeed Vcooling>=100 DEG C/s; Adopt rapid cooling-return temperature-rapid cooling-return the segmentation notch cuttype control cooling means of temperature circulation, in controlCold bed returns 680～770 DEG C of Wen Wendu;
4) the hot-rolled high-strength reinforcing bar of all employing segmentation notch cuttype process for cooling, does not all occur after upper cold bed that surface is redFe2O3Rusty scale.
5) outdoor placement 1 month, corrosion area be equivalent to wear by force cooling process corrosion area 50%.
In the each embodiment of table 1, technique-microscopic structure-mechanical property gathers
The contrast of table 2 iron scale control technology of the present invention and external similar technical merit
The present invention discloses a kind of segmentation notch cuttype process for cooling and scale structure controlling party of hot-rolled reinforced bar firstMethod, adopts segmentation notch cuttype process for cooling of the present invention and scale structure control method, can replace traditional wearingCooling process, makes the power of ideal format φ 20～25mm (but being not limited to this specification limit) hot rolling HRB400 grade reinforcing steelLearn all technical requirement that performance meets GB1499.2-2007, all employing segmentation notch cuttype process for cooling simultaneouslyHot-rolled high-strength reinforcing bar, all there is not surperficial red Fe in upper cold bed2O3Rusty scale. Sem analysis shows iron oxide skin depthDegree is at 10～30 μ m. Sample through outdoor placement after 1 month corrosion area be equivalent to wear by force the corrosion area of cooling process50%.

Claims (1)

1. a method for the cooling control scale structure of segmentation notch cuttype of hot-rolled reinforced bar, is characterized in that:
The percentage by weight of described hot-rolled reinforced bar chemical composition is C:0.20%-0.25%, Si:0.30%-0.60%,Mn:0.90%-1.40%, V:0-0.02%, Cr:0-0.25%, P≤0.035%, S≤0.040%, all the other areIron and inevitably impurity; The technical parameter of the cooling control of segmentation notch cuttype is as follows:
(1) steel rolling is produced, and smelting continuous blank heating temperature is 1100 DEG C-1150 DEG C, and steel billet tapping temperature is 1050 DEG C-1100 DEG C, start rolling temperature is 1000 DEG C-1050 DEG C, and finishing temperature is 900 DEG C-1000 DEG C;
(2) after finish to gauge reinforcing bar with 10m/s～15m/s speed operation and the rebar surface more than 1000 DEG C enters to temperatureRow quick cooling processing, i.e. Vcooling>=100 DEG C/s; Adopt rapid cooling-return temperature-rapid cooling-return segmentation notch cuttype control of temperature circulationCooling means, obtains the warm cooling path of lowering the temperature-return, and makes the running reinforcing bar of high temperature and high speed in 1s to 3s, pass through waterWhile mixing the cooling section of composition with water smoke, utilize evaporation of water to take away a large amount of latent heats of vaporization, thereby return temperature after quick coolingTo 600～980 DEG C of target temperatures; To tissue, mechanical property and slow demand of getting rusty, roll rear cooling procedure according to userThe middle scale structure control technique of simultaneously implementing;
(3) scale structure control technique: application segmentation notch cuttype process for cooling control surface and heart portion maximum temperature differenceIt is 200～400 DEG C; Iron scale even thickness is controlled at 10～30 μ m; Scale structure is a certain proportion of FeO+20～50％Fe3O4; Improve the Nomenclature Composition and Structure of Complexes of surface scale in cooling procedure in, ensure the densification of structureIntegrality.
CN201511005630.9A 2015-12-28 2015-12-28 The method of the piece-wise step type cooling control scale structure of hot-rolled reinforced bar Active CN105583235B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201511005630.9A CN105583235B (en) 2015-12-28 2015-12-28 The method of the piece-wise step type cooling control scale structure of hot-rolled reinforced bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201511005630.9A CN105583235B (en) 2015-12-28 2015-12-28 The method of the piece-wise step type cooling control scale structure of hot-rolled reinforced bar

Publications (2)

Publication Number Publication Date
CN105583235A true CN105583235A (en) 2016-05-18
CN105583235B CN105583235B (en) 2017-06-23

Family

ID=55923350

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201511005630.9A Active CN105583235B (en) 2015-12-28 2015-12-28 The method of the piece-wise step type cooling control scale structure of hot-rolled reinforced bar

Country Status (1)

Country Link
CN (1) CN105583235B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106391734A (en) * 2016-08-17 2017-02-15 钢铁研究总院 Sectional step type cooling device for hot rolling of high-strength steel bars
CN109550794A (en) * 2018-12-25 2019-04-02 鞍钢集团朝阳钢铁有限公司 A kind of feed forward control method for hot fine rolling outlet temperature
CN109675941A (en) * 2018-12-29 2019-04-26 钢铁研究总院 A kind of cold bed control cooling device of hot-rolled microalloy reinforcing bar
CN109731932A (en) * 2019-01-10 2019-05-10 山东莱钢永锋钢铁有限公司 A kind of anti-red rust method of reinforcing bar
CN110760757A (en) * 2019-08-14 2020-02-07 钢铁研究总院 Low-cost strengthening process of hot-rolled steel bar
CN111057836A (en) * 2019-12-31 2020-04-24 钢铁研究总院 Control method for cooling path of high-strength steel bar
CN111074152A (en) * 2019-12-21 2020-04-28 钢铁研究总院 Hierarchical controlled cooling process for 600 MPa-grade high-strength anti-seismic weather-resistant hot-rolled steel bars
CN111172357A (en) * 2020-01-21 2020-05-19 包头钢铁（集团）有限责任公司 Method for increasing Fe content in oxide film on surface of steel rail3O4Method of proportioning
CN111455281A (en) * 2020-04-17 2020-07-28 柳州钢铁股份有限公司 Method for controlling yield strength fluctuation of same ring of HRB400E wire rod twisted steel and HRB400E wire rod twisted steel
CN111974797A (en) * 2020-07-24 2020-11-24 柳州钢铁股份有限公司 Wire rod steel bar with surface oxidized iron sheet thickness of more than 12 mu m
CN112404143A (en) * 2020-10-29 2021-02-26 中天钢铁集团有限公司 Controlled cooling method for improving corrosion resistance of cold heading steel wire rod
CN112453052A (en) * 2020-11-24 2021-03-09 云南曲靖呈钢钢铁（集团）有限公司 Novel rolling process of high-manganese vanadium-free steel bar
CN113373377A (en) * 2021-05-28 2021-09-10 广西柳钢华创科技研发有限公司 Low-cost high-speed bar deformed steel bar with surface oxidized iron sheet thickness of more than 10 mu m and production method thereof
CN114042762A (en) * 2021-09-13 2022-02-15 阳春新钢铁有限责任公司 Production method for improving corrosion resistance of deformed steel bar
CN114309061A (en) * 2021-11-24 2022-04-12 盐城市联鑫钢铁有限公司 Technology for controlling oxide scale structure of fine-grain hot-rolled steel bar on line
CN114453437A (en) * 2022-01-20 2022-05-10 甘肃酒钢集团宏兴钢铁股份有限公司 Controlled cooling production method of hot-rolled steel bar without martensite ring on surface
CN114643289A (en) * 2022-03-08 2022-06-21 石横特钢集团有限公司 Deformed steel bar controlled cooling process method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06287638A (en) * 1993-04-02 1994-10-11 Toa Steel Co Ltd Production of wear resistant bar steel
EP1029938A2 (en) * 1999-02-18 2000-08-23 Nippon Steel Corporation Rolled steel having few inclusion defects
JP2004052064A (en) * 2002-07-23 2004-02-19 Jfe Steel Kk Method for producing free cutting steel
CN101012528A (en) * 2007-01-25 2007-08-08 鞍钢股份有限公司 Surface iron scale control method for middle sheet billet continuous casting and rolling steel plate
CN101147920A (en) * 2007-11-06 2008-03-26 攀钢集团攀枝花钢铁研究院 Hot rolled steel plate surface oxidation iron sheet control method for vanadium-containing automobile beam
CN101235476A (en) * 2008-01-08 2008-08-06 江苏沙钢集团有限公司 Technique for controlling hot rolling rod bundle surface iron scale
CN101386906A (en) * 2007-09-10 2009-03-18 南京钢铁联合有限公司 Cooling technique after lead treated steel rolling
CN101856669A (en) * 2010-06-02 2010-10-13 东北大学 Control method of softness of oxide scales on surface of hot-rolling strip steel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06287638A (en) * 1993-04-02 1994-10-11 Toa Steel Co Ltd Production of wear resistant bar steel
EP1029938A2 (en) * 1999-02-18 2000-08-23 Nippon Steel Corporation Rolled steel having few inclusion defects
JP2004052064A (en) * 2002-07-23 2004-02-19 Jfe Steel Kk Method for producing free cutting steel
CN101012528A (en) * 2007-01-25 2007-08-08 鞍钢股份有限公司 Surface iron scale control method for middle sheet billet continuous casting and rolling steel plate
CN101386906A (en) * 2007-09-10 2009-03-18 南京钢铁联合有限公司 Cooling technique after lead treated steel rolling
CN101147920A (en) * 2007-11-06 2008-03-26 攀钢集团攀枝花钢铁研究院 Hot rolled steel plate surface oxidation iron sheet control method for vanadium-containing automobile beam
CN101235476A (en) * 2008-01-08 2008-08-06 江苏沙钢集团有限公司 Technique for controlling hot rolling rod bundle surface iron scale
CN101856669A (en) * 2010-06-02 2010-10-13 东北大学 Control method of softness of oxide scales on surface of hot-rolling strip steel

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
潘燕: "冷却工艺对普碳线材氧化铁皮生成的影响", 《轧钢》 *
赵久长: "热轧带钢表面氧化铁皮控制与消除", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 *
闫萍: "热轧带钢表面氧化铁皮控制", 《科技创新与应用》 *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106391734A (en) * 2016-08-17 2017-02-15 钢铁研究总院 Sectional step type cooling device for hot rolling of high-strength steel bars
CN109550794A (en) * 2018-12-25 2019-04-02 鞍钢集团朝阳钢铁有限公司 A kind of feed forward control method for hot fine rolling outlet temperature
CN109675941A (en) * 2018-12-29 2019-04-26 钢铁研究总院 A kind of cold bed control cooling device of hot-rolled microalloy reinforcing bar
CN109675941B (en) * 2018-12-29 2023-10-31 钢铁研究总院 Cooling bed control cooling device for hot-rolled microalloyed steel bar
CN109731932A (en) * 2019-01-10 2019-05-10 山东莱钢永锋钢铁有限公司 A kind of anti-red rust method of reinforcing bar
CN110760757A (en) * 2019-08-14 2020-02-07 钢铁研究总院 Low-cost strengthening process of hot-rolled steel bar
CN110760757B (en) * 2019-08-14 2021-12-03 钢铁研究总院 Low-cost strengthening process of hot-rolled steel bar
CN111074152A (en) * 2019-12-21 2020-04-28 钢铁研究总院 Hierarchical controlled cooling process for 600 MPa-grade high-strength anti-seismic weather-resistant hot-rolled steel bars
CN111074152B (en) * 2019-12-21 2021-12-28 钢铁研究总院 Hierarchical controlled cooling process for 600 MPa-grade high-strength anti-seismic weather-resistant hot-rolled steel bars
CN111057836B (en) * 2019-12-31 2021-03-09 钢铁研究总院 Control method for cooling path of high-strength steel bar
CN111057836A (en) * 2019-12-31 2020-04-24 钢铁研究总院 Control method for cooling path of high-strength steel bar
CN111172357A (en) * 2020-01-21 2020-05-19 包头钢铁（集团）有限责任公司 Method for increasing Fe content in oxide film on surface of steel rail3O4Method of proportioning
CN111455281B (en) * 2020-04-17 2021-05-14 柳州钢铁股份有限公司 Method for controlling yield strength fluctuation of same ring of HRB400E wire rod twisted steel and HRB400E wire rod twisted steel
CN111455281A (en) * 2020-04-17 2020-07-28 柳州钢铁股份有限公司 Method for controlling yield strength fluctuation of same ring of HRB400E wire rod twisted steel and HRB400E wire rod twisted steel
CN111974797A (en) * 2020-07-24 2020-11-24 柳州钢铁股份有限公司 Wire rod steel bar with surface oxidized iron sheet thickness of more than 12 mu m
CN112404143A (en) * 2020-10-29 2021-02-26 中天钢铁集团有限公司 Controlled cooling method for improving corrosion resistance of cold heading steel wire rod
CN112404143B (en) * 2020-10-29 2022-04-08 中天钢铁集团有限公司 Controlled cooling method for improving corrosion resistance of cold heading steel wire rod
CN112453052A (en) * 2020-11-24 2021-03-09 云南曲靖呈钢钢铁（集团）有限公司 Novel rolling process of high-manganese vanadium-free steel bar
CN113373377A (en) * 2021-05-28 2021-09-10 广西柳钢华创科技研发有限公司 Low-cost high-speed bar deformed steel bar with surface oxidized iron sheet thickness of more than 10 mu m and production method thereof
CN114042762A (en) * 2021-09-13 2022-02-15 阳春新钢铁有限责任公司 Production method for improving corrosion resistance of deformed steel bar
CN114042762B (en) * 2021-09-13 2023-09-26 阳春新钢铁有限责任公司 Production method for improving rust resistance of deformed steel bar
CN114309061A (en) * 2021-11-24 2022-04-12 盐城市联鑫钢铁有限公司 Technology for controlling oxide scale structure of fine-grain hot-rolled steel bar on line
CN114453437A (en) * 2022-01-20 2022-05-10 甘肃酒钢集团宏兴钢铁股份有限公司 Controlled cooling production method of hot-rolled steel bar without martensite ring on surface
CN114643289A (en) * 2022-03-08 2022-06-21 石横特钢集团有限公司 Deformed steel bar controlled cooling process method

Also Published As

Publication number Publication date
CN105583235B (en) 2017-06-23

Similar Documents

Publication Publication Date Title
CN105583235A (en) Method for controlling iron scale structures of hot-rolled steel bars by stepped cooling
CN103962386B (en) The corrosion proof iron scale control method of a kind of raising hot rolled steel plate
CN102492894B (en) The corrosion-resistant martensitic steel of high-dimensional stability and steel structure material preparation method thereof
CN100558504C (en) The low temperature resistant oil derrick power transmission tower frame preparation method of seamless heterotype steel pipe
CN109825774B (en) Preparation method of bainite-martensite multiphase wear-resistant corrosion-resistant steel
CN102392189B (en) High-Cr ferrite stainless steel and manufacturing method thereof
CN103205651A (en) On-line quenching production method of low-cost high-strength abrasion-resistant steel plate
CN101328560B (en) Ni seamless steel pipe and manufacturing method thereof
CN103243275A (en) Preparation method of bainite/martensite/austenite composite high-strength steel
CN103643143B (en) A kind of 600MPa level Green heat treatment high strength cast iron and working method thereof
CN103266269A (en) HB500 grade hot continuous rolling high strength wear-resisting steel and production method thereof
CN105369126B (en) A kind of production method and finish rolling deformed bar of steel alloy and its finish rolling deformed bar
CN102719757A (en) Nickel-free high-toughness 80kg-grade high-strength steel and manufacturing method thereof
CN110438388B (en) Preparation method of Australian alternate wear-resistant corrosion-resistant steel
CN102268520A (en) Heat treatment method for high-strength wear-resistant steel plates
CN102634738A (en) Supporting roller with roughness keeping capability and manufacturing method thereof
WO2023000584A1 (en) 1000 mpa-grade quenched and tempered hydroelectric steel plate and production method therefor
CN101586214A (en) High-hardness high-wear-resistant powder metallurgy high-speed steel
CN103215491A (en) Method for preparing carbon-silicon-manganese-series Q&P steel through alloy element partitioning
CN103173681B (en) Cold rolled steel working roll using SKD-11 steel and production process thereof
CN104451437B (en) A kind of preparation method of high-performance large-scale cold roll
CN109055692A (en) A kind of pressure vessel is with exempting from anneal Dual-phase steel wire rod and its production method
CN103498103A (en) High-hardenability big-diameter 65MnCr grinding ball and preparation method thereof
CN103028608A (en) Control method of component and thickness of iron oxide scale on surface of hot rolled strip steel
CN103556080B (en) The property control method of Direct Rolling long profiles

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant